Studies on nonisothermal crystallization of ultra-high molecular weight polyethylene in liquid paraffin

The nonisothermal crystallization kinetics for ultra–high molecular weight polyethylene (UHMWPE) in liquid paraffin (LP) systems was investigated through differential scanning calorimetry (DSC) measurement. The influence of UHMWPE concentration and cooling rate on crystallization mechanism and spher...

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Published inJournal of applied polymer science Vol. 99; no. 5; pp. 2782 - 2788
Main Authors Zhang, Chunfang, Zhu, Baoku, Ji, Genliang, Xu, Youyi
Format Journal Article
LanguageEnglish
Published Hoboken Wiley Subscription Services, Inc., A Wiley Company 05.03.2006
Wiley
Subjects
Applied sciences
Avrami equation
Crystallization
differential scanning calorimetry
Exact sciences and technology
kinetics
Organic polymers
Physicochemistry of polymers
Properties and characterization
ultra-high molecular weight polyethylene
Ultra high molecular weight ethylene polymer
Polymer blends
Crystallinity
Experimental study
Paraffin
Modeling
Structure processing relationship
Kinetic model
Melt crystallization
ultra-high molecular weight polyethylene
Spherulites
differential scanning calorimetry
Concentration effect
crystallization
Olefin polymer
Kinetics
Crystal morphology
Avrami equation
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Summary:The nonisothermal crystallization kinetics for ultra–high molecular weight polyethylene (UHMWPE) in liquid paraffin (LP) systems was investigated through differential scanning calorimetry (DSC) measurement. The influence of UHMWPE concentration and cooling rate on crystallization mechanism and spherulitc structure as implied by the modified Avrami equation and Mo's analysis was determined, whereas the Ozawa's approach fails to describe the crystallization behaviors of these UHMWPE‐diluent systems. As a result, in the modified Avrami analysis, it was found that the Avrami exponent is constant around five at various concentrations of UHMWPE and cooling rates. Further, the value of F(T) in the Mo's approach increases with the increasing of relative crystallinity and UHMWPE content in the blends. The nonisothermal crystallization kinetics presented here are the first for UHMWPE‐diluent systems. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci, 2006
Bibliography:ArticleID:APP22645
ark:/67375/WNG-M954TLNN-K
istex:EC2A7F33E58F9F37E003E3C030981C29748CBAC9
National 973 Foundation of China - No. No 2003.CB615705
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0021-8995
1097-4628
DOI:10.1002/app.22645